Chao-Kuei Hung ckhung
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| #!/bin/bash | |
| # screenshot caption concatenation | |
| # assumption: | |
| # 1. all screenshot files are of the same extension, of the same size, with ordered file names. | |
| # 2. there are no other files with names sscapcat[059]-* in /tmp. | |
| read -r x_pad y_header y_content y_caption out_file <<<$(echo 0 0 0 0 result.jpg) | |
| while getopts 'x:y:o:h' opt; do |
ckhung
/ gist:51c92363bca79dd165435b217c1ec5f4
Last active
September 3, 2025 02:51
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| # Norman Wildberger + Dean Rubine | |
| # Finding a root of a cubic polynomial with geode | |
| # https://youtu.be/oIHd3zDDDCE?si=BIlgB9ub57UPdJ38&t=1730 | |
| def Q(t2, t3): | |
| return 1 + (t2+t3) * (1+2*t2+3*t3+5*t2*t2+16*t2*t3+12*t3*t3) | |
| def shift(C, ap): | |
| return [ | |
| C[0] + ap*C[1] + ap*ap*C[2] + ap*ap*ap*C[3], |
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| // dot -Tsvg flow.dot > flow.svg | |
| digraph "gs2umap 資料流向 (上下游關係)" { | |
| rankdir = TB; | |
| overlap = scale; | |
| key [ label="gsheet-key.txt" ]; | |
| gs [ label="google sheet" ]; | |
| php [ label="gs2umap.php" ]; | |
| python [ label="gs2umap.py" ]; |
ckhung
/ gsheet2umap.php
Last active
July 13, 2025 03:06
convert a google sheet containing longitude and latitude fields into a csv file recognized by umap of osm
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| <?php | |
| // 共筆維護試算表、地圖自動更新 https://newtoypia.blogspot.com/2025/03/gsheet-umap.html | |
| if (! (isset($_GET['html']) && filter_var($_GET['html'], FILTER_VALIDATE_URL))) { | |
| echo 'needs "html" variable on command line'; | |
| return; | |
| } | |
| $url = $_GET['html']; | |
| $htmlContent = file_get_contents($url); | |
| $tmpHtmlFile = tempnam(sys_get_temp_dir(), 'html_'); |
ckhung
/ nmj2csv.pl
Created
February 1, 2025 02:41
generate a csv file with date time strings that are easier to sort, from the output of: notmuch show --format=json '*' | jq 'map(.[0][0] | [.headers.Date, .id, .headers.Subject])'
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| #!/usr/bin/perl -w | |
| # This script processes the output of: | |
| # notmuch show --format=json '*' | jq 'map(.[0][0] | [.headers.Date, .id, .headers.Subject])' | |
| # to create a csv file with date time strings that are easier to sort. | |
| use Date::Parse; | |
| while (<>) { | |
| next unless /"(.*)"/; | |
| my $item = $1; |
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| #!/usr/bin/python3 | |
| import argparse, re, csv | |
| parser = argparse.ArgumentParser( | |
| description='read csv files and print to stdout in vcf format', | |
| formatter_class=argparse.ArgumentDefaultsHelpFormatter) | |
| parser.add_argument('-d', '--delimiter', type=str, default=',', | |
| help='field delimiter character') | |
| parser.add_argument('mapping', |
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| # ~/.mbsyncrc | |
| # modified from https://www.cosroe.com/2024/05/neomutt-isync.html | |
| # Global defaults that apply to all channels / accounts / stores | |
| # Create in both places | |
| Create Both | |
| # Do not remove if missing in one place | |
| Remove None | |
| # Permanently delete those messages marked for deletion |
ckhung
/ imap7to8.py
Created
November 23, 2024 13:26
mutt_oauth2.py and scripts to convert imap encoded foldernames or subject names
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| #!/usr/bin/env python3 | |
| # https://stackoverflow.com/a/12803967 | |
| # IMAP folder path encoding (IMAP UTF-7) for Python | |
| import sys, re | |
| from imapclient import imap_utf7 | |
| for line in sys.stdin: | |
| line = line.strip().encode('ascii') |
ckhung
/ lagrange.gpt
Last active
October 19, 2024 07:31
lagrange points as seen using effective potential plot
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| # lagrange points as seen using effective potential plot | |
| len(x,y) = sqrt(x*x+y*y) | |
| # mass of planet relative to that of star | |
| alpha = 0.01 # "mu" in wikipedia | |
| # mass of star and mass of planet | |
| Ms = 1000 | |
| Mp = Ms * alpha |
ckhung
/ gen-theme-tiles.sh
Last active
October 4, 2025 01:40
generate tiles needed for window border parts for a dark xfce4 theme so that one can have a dark desktop with bright window borders
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| # 2025/10/04 把原先的黃/綠色框改成紫色框，跟 Sweet-Dark-v40 原來的顏色比較搭 | |
| ACTIVE_BORDER_COLOR="#ce93ff" | |
| INACTIVE_BORDER_COLOR="#7944aa" | |
| TITLE_HEIGHT=18 | |
| for i in 1 2 3 4 5 ; do convert -size 24x$TITLE_HEIGHT xc:$ACTIVE_BORDER_COLOR title-$i-active.png ; done | |
| convert -size 5x$TITLE_HEIGHT xc:$ACTIVE_BORDER_COLOR top-left-active.png | |
| convert -size 5x$TITLE_HEIGHT xc:$ACTIVE_BORDER_COLOR top-right-active.png | |
| convert -size 3x16 xc:$ACTIVE_BORDER_COLOR left-active.png | |
| convert -size 3x16 xc:$ACTIVE_BORDER_COLOR right-active.png |
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